Finding the Fourth Proportional to 10,886.86, 16,320.30 and 3,956.50

Step by Step Solution

1. Step 1: Write the proportion equation
   10,886.86 : 16,320.30 = 3,956.50 : x
2. Step 2: Convert to fraction form
   10,886.86/16,320.30 = 3,956.50/x
3. Step 3: Cross multiply
   10,886.86x = 16,320.30 × 3,956.50
4. Step 4: Simplify right side
   10,886.86x = 64,571,266.95
5. Step 5: Solve for x
   x = 64,571,266.95/10,886.86
6. Step 6: Final answer
   x = 5,931.12